CN114962315B - PSU fan rotating speed control method, system, device and medium - Google Patents

Abstract

The application discloses a control method, a system, a device and a medium for PSU fan rotation speed, and mainly relates to the PSU field. The method includes receiving a digital quantity of the voltage difference transmitted by the AD converter; the digital quantity of the voltage difference is obtained by amplifying the voltage difference between two ends of the PCB golden finger measured by the voltmeter through a voltage amplifier and converting the analog quantity of the amplified voltage difference through an AD converter; calculating the current temperature variation according to the digital quantity of the voltage difference value; and adjusting the electrifying quantity of the electromagnetic coil in the fan according to the current temperature variation quantity so as to realize the adjustment of the rotating speed of the fan. Therefore, the method does not need to install a temperature sensor on each heat source element in the PSU to measure the temperature variation, but calculates the current temperature variation in the PSU through the voltage difference value between the two ends of the golden finger, so that the number of the cooling fins is effectively reduced, the use space in the PSU is increased, and meanwhile, the economy is improved.

Description

Method, system, device and medium for controlling PSU fan speed

technical field

The present application relates to the field of PSUs, in particular to a method, system, device and medium for controlling the rotational speed of a PSU fan.

Background technique

Depending on the designed power and structure, the power supply unit (PSU) can be composed of dozens or even thousands of parts. These parts will generate corresponding heat energy as the load conditions increase. PSUs are usually equipped with cooling fans, which can dissipate the internal heat energy by using the air flow generated by the fans. PSU usually controls the speed of the fan by the temperature change of its heat source components. Therefore, in order to dissipate heat from the PSU, it is first necessary to know the total heat dissipation inside the module and the total allowable temperature rise, so as to calculate the air flow required for cooling the device, so as to realize the control of the fan. speed to prevent the PSU from overheating.

As the output load of the PSU increases, corresponding heat energy will be generated, so that the temperature of the heat source element in the PSU will further rise due to the increase of the output load. Currently, a detection device is installed on the heat source element in the PSU, such as a temperature sensor, to sense the temperature change on the heat source element, control and adjust the fan speed according to the temperature change, and use the air flow generated by the fan to take out the heat energy in the casing. Further, the effect of dissipating heat from the PSU is achieved to ensure the normal operation of the PSU. However, at present, all heat source components in the PSU need to be equipped with a temperature sensor on its heat sink, which increases the use area of the heat sink and occupies more internal space of the PSU. At the same time, due to the need to install multiple temperature sensors , so the current method is less economical.

It can be seen that how to increase the usable space in the PSU is an urgent problem to be solved by those skilled in the art.

Contents of the invention

The purpose of the present application is to provide a method, system, device and medium for controlling the speed of a PSU fan, which are used to increase the use space in the PSU and improve the economy.

In order to solve the above technical problems, the application provides a PSU fan speed control system, including: a voltmeter, a voltage amplifier, an AD converter and a CPU;

The voltmeter is connected to the PCB gold finger to measure the voltage difference between the two ends of the PCB gold finger;

The voltage amplifier is connected with the voltmeter to amplify the voltage difference;

The AD converter is connected with the voltage amplifier for converting the amplified analog value of the voltage difference into a digital value;

The CPU is connected with the AD converter and the fan to receive the digital value of the voltage difference sent by the AD converter, calculate the current temperature change according to the digital value of the voltage difference, and adjust the electromagnetic coil in the fan according to the current temperature change. power supply.

In order to solve the above-mentioned technical problems, the application also provides a method for controlling the speed of the PSU fan, which is applied to the control system of the speed of the PSU fan. The system includes a voltmeter, a voltage amplifier, an AD converter and a CPU. The method includes:

Receive the digital quantity of the voltage difference sent by the AD converter; where the digital quantity of the voltage difference is to amplify the voltage difference at both ends of the PCB gold finger measured by the voltmeter through the voltage amplifier, and use the AD converter to amplify the amplified The analog value of the voltage difference is converted to obtain;

Calculate the current temperature change according to the digital value of the voltage difference;

According to the current temperature change, the energization of the electromagnetic coil in the fan is adjusted, so as to realize the adjustment of the rotating speed of the fan.

Preferably, adjusting the energization of the electromagnetic coil in the fan according to the current temperature variation includes:

Obtaining the target rotational speed corresponding to the current temperature variation according to the correspondence between the pre-established temperature variation and the output load of the PSU and the correspondence between the output load of the PSU and the fan speed;

Adjust the energization of the electromagnetic coil in the fan so that the current speed of the fan is consistent with the target speed.

Preferably, after calculating the current temperature variation according to the digital value of the voltage difference, the method further includes:

A target temperature threshold value corresponding to the current temperature change amount is obtained according to the current temperature change amount; wherein, the temperature threshold value is proportional to the temperature change amount;

Correspondingly, adjusting the energization of the electromagnetic coil in the fan according to the current temperature variation includes:

The energization amount of the electromagnetic coil in the fan is adjusted according to the target temperature threshold.

Preferably, after adjusting the energization of the electromagnetic coil in the fan according to the target temperature threshold, the method further includes:

Obtain the fan speed range corresponding to the current output load of the PSU according to the pre-established correspondence between the output load of the PSU and the fan speed;

Determine whether the current speed of the fan is within the speed range;

If so, enter the step of receiving the digital quantity of the voltage difference sent by the AD converter;

If not, adjust the conduction amount of the electromagnetic coil in the fan so that the current speed of the fan is within the speed range.

Preferably, after calculating the current temperature variation according to the digital value of the voltage difference, and before adjusting the energization of the electromagnetic coil in the fan according to the current temperature variation, the method further includes:

Determine whether the current temperature change reaches the temperature change threshold;

If yes, determine that the PSU is overheated;

If not, enter into the step of adjusting the energizing amount of the electromagnetic coil in the fan according to the current temperature variation.

Preferably, after determining that the PSU is in an overheated state, the method further includes: controlling an alarm device to issue an alarm.

In order to solve the above technical problems, the present application also provides a control device for PSU fan speed, including:

The receiving module is used to receive the digital quantity of the voltage difference sent by the AD converter; wherein, the digital quantity of the voltage difference is to amplify the voltage difference at both ends of the PCB golden finger measured by the voltmeter through the voltage amplifier, and convert it through AD The converter converts the analog value of the amplified voltage difference to obtain;

A calculation module, configured to calculate the current temperature variation according to the digital value of the voltage difference;

The adjustment module is used to adjust the energization of the electromagnetic coil in the fan according to the current temperature variation, so as to realize the adjustment of the rotation speed of the fan.

In order to solve the above technical problems, the present application also provides a control device for PSU fan speed, including:

memory for storing computer programs;

The processor is used for realizing the steps of the method for controlling the rotation speed of the PSU fan when executing the computer program.

In order to solve the above-mentioned technical problems, the present application also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the above-mentioned method for controlling the PSU fan speed are realized.

A method for controlling the speed of a PSU fan provided by the present application is applied to the control system of the above-mentioned PSU fan speed. The method includes receiving the digital quantity of the voltage difference sent by the AD converter; wherein, the digital quantity of the voltage difference is passed The voltage amplifier amplifies the voltage difference at both ends of the PCB gold finger measured by the voltmeter, and converts the analog value of the amplified voltage difference through the AD converter; calculates the current temperature change according to the digital value of the voltage difference; According to the current temperature change, the energization of the electromagnetic coil in the fan is adjusted, so as to realize the adjustment of the rotating speed of the fan. It can be seen that compared with the traditional method, this method does not need to install a temperature sensor on each heat source element in the PSU to measure the temperature change of each device, but calculates the current temperature change inside the PSU through the voltage difference between the two ends of the gold finger. , and then adjust the fan speed according to the current temperature change, thus effectively reducing the number of heat sinks used, increasing the use space inside the PSU, and improving economical efficiency.

In addition, the device and medium for controlling the speed of the PSU fan provided in the present application have the same beneficial effect as the method for controlling the speed of the PSU fan mentioned above.

Description of drawings

In order to illustrate the embodiments of the present application more clearly, the following will briefly introduce the accompanying drawings used in the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. As far as people are concerned, other drawings can also be obtained based on these drawings on the premise of not paying creative work.

Fig. 1 is the structural diagram of the control system of a kind of PSU fan speed that the application provides;

Fig. 2 is a schematic diagram of a thermocouple effect provided by the application;

FIG. 3 is a schematic diagram of a fan in a PSU provided by the present application;

Fig. 4 is the flowchart of the control method of a kind of PSU fan speed provided by the present application;

FIG. 5 is a structural diagram of a control device for a PSU fan speed provided by the present application;

FIG. 6 is a structural diagram of another device for controlling the rotational speed of a PSU fan provided by the present application.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of this application.

The core of the present application is to provide a PSU fan speed control method, system, device and medium, which are used to increase the use space in the PSU and improve the economy.

In order to enable those skilled in the art to better understand the solution of the present application, the present application will be further described in detail below in conjunction with the drawings and specific implementation methods.

FIG. 1 is a structural diagram of a PSU fan speed control system provided by the present application. The structure shown in FIG. 1 will be described below.

The control system of PSU fan speed includes: voltmeter 101, voltage amplifier 102, AD converter 103 and central processing unit 104 (Central Processing Unit, CPU); voltmeter 101 and printed circuit board (Printed CircuitBoard, PCB) golden finger connected to measure the voltage difference at both ends of the PCB golden finger; the voltage amplifier 102 is connected to the voltmeter 101 to amplify the voltage difference; the AD converter 103 is connected to the voltage amplifier 102 to be used to amplify the voltage difference The analog quantity is converted into a digital quantity; the CPU 104 is connected with the AD converter 103 and the fan, and is used to receive the digital quantity of the voltage difference sent by the AD converter 103, calculate the current temperature variation according to the digital quantity of the voltage difference, and calculate the current temperature change according to the current temperature The delta adjusts the amount of energization to the solenoid inside the fan.

At present, the PCB output end of the PSU is composed of PCB gold finger devices, which are connected to the connector through the gold finger. Figure 2 is a schematic diagram of a thermocouple effect provided by the present application. As shown in Figure 2, at the PCB junction of the gold finger, the principle of the thermocouple effect can be used to detect the temperature change at the connection between the connector and the gold finger , wherein the temperature change refers to the difference between the current temperature of the gold finger of the PSU and the temperature when the PSU is not working. Among them, the thermocouple effect refers to the formation of two conductors with different components into a closed loop. When the two contacts of the closed loop are placed at different temperatures, a voltage will be generated in the loop. Specifically, in order to reduce the contact impedance, the gold finger will be plated with metal material. Since the gold finger and the connector are made of gold-plated material, and the PCB is made of copper foil, when the two contact surfaces of the above two different metal materials are placed on the A voltage can be generated at different temperatures. By detecting the voltage, the temperature of the connector can be measured, and then the temperature change of the golden finger on the PSU output terminal can be detected. See Figure 2 for details.

In the specific implementation, the voltage difference between the two ends of the PCB gold finger is measured by the voltmeter 101. For the convenience of calculating the temperature change, the voltage amplifier 102 first amplifies the measured voltage difference, and then the AD converter 103 converts the voltage The analog value of the voltage difference processed by the amplifier 102 is converted into a digital value, and finally the CPU 104 calculates the current temperature change according to the digital value of the voltage difference, and the calculated current temperature change is obtained from the pre-established temperature change and the PSU Query the corresponding target speed in the corresponding relationship between the output load of the PSU and the corresponding relationship between the output load of the PSU and the fan speed, and control the fan speed by adjusting the energization of the electromagnetic coil in the fan so that the fan speed reaches the target speed. Figure 3 is a schematic diagram of a fan in a PSU provided by the present application. As shown in Figure 3, the electromagnetic coil is wound on the fan shaft 3, and the permanent magnet 1 is provided with a fixing hole 4 for the electromagnetic coil, and passes through the fixing hole of the electromagnetic coil 4 can fix the electromagnetic coil. Specifically, by controlling the magnitude of the electric current of the electromagnetic coil on the fan, a corresponding magnetic force can be generated on the rotating shaft, and the greater the magnetic force, the smaller the friction on the rotating shaft, and the greater the fan speed. On the contrary, the stronger the magnetic force The smaller the friction on the shaft, the smaller the fan speed.

It should be noted that, in order to facilitate querying the calculated target speed corresponding to the current temperature change, it is necessary to establish the corresponding relationship between the temperature change and the output load of the PSU and the corresponding relationship between the output load of the PSU and the fan speed. Specifically, you can The corresponding relationship between the PSU output load and the temperature change is constructed through the output load data of multiple sets of PSUs and the temperature change of the golden finger corresponding to the output load data of each set of PSUs. Since the temperature change and the heat dissipation required There is a corresponding relationship between the air flow, so the corresponding relationship between the PSU output load and the air flow can be established based on the corresponding relationship between the temperature change and the air flow, and because the air flow corresponds to the fan speed, the PSU can be further established. The corresponding relationship between the output load and the fan speed, so that after calculating the current temperature change, the corresponding relationship between the temperature change and the output load of the PSU and the corresponding relationship between the output load of the PSU and the fan speed can be queried to obtain the corresponding relationship between the current temperature change target speed. In addition, in the actual implementation, it is necessary to test the temperature of each heat source element in the PSU, and confirm the speed of the fan controlled by it, so as to ensure that the air flow of the fan can take out the heat energy of each heat source element inside the PSU. Outside the PSU, it achieves the effect of dissipating heat from each heat source element in the PSU.

The present embodiment provides a control system for the speed of a PSU fan. The system includes: a voltmeter, a voltage amplifier, an AD converter, and a CPU; The amplifier is connected with the voltmeter for amplifying the voltage difference; the AD converter is connected with the voltage amplifier for converting the amplified analog value of the voltage difference into a digital value; the CPU is connected with the AD converter and the fan for receiving The digital value of the voltage difference sent by the AD converter is used to calculate the temperature change according to the digital value of the voltage difference, and to adjust the current flow of the electromagnetic coil in the fan according to the temperature change. It can be seen that in this system, it is not necessary to install temperature sensors on each heat source element in the PSU to measure the temperature change of each device, but to calculate the temperature inside the PSU by measuring the voltage difference between the two ends of the gold finger based on the thermocouple effect The amount of change, and then adjust the fan speed according to the amount of temperature change, effectively reducing the number of heat sinks used, increasing the use of space inside the PSU, and improving economical efficiency.

FIG. 4 is a flow chart of a method for controlling the speed of a PSU fan provided by the present application, and the method is applied to a control system for the speed of a PSU fan including a voltmeter, a voltage amplifier, an AD converter and a CPU. As shown in Figure 4, the method includes:

S1: Receive the digital value of the voltage difference sent by the AD converter; among them, the digital value of the voltage difference is to amplify the voltage difference between the two ends of the PCB golden finger measured by the voltmeter through the voltage amplifier, and amplify it through the AD converter The analog value of the voltage difference after conversion is obtained.

In the specific implementation, the voltage difference between the two ends of the PCB golden finger is measured by a voltmeter, and then the measured voltage difference is amplified by the voltage amplifier, and finally the analog value of the voltage difference is converted into the voltage difference by the AD converter. digital quantity.

S2: Calculate the current temperature change according to the digital value of the voltage difference.

The calculation formula of temperature change is shown in formula (1):

[S(T)]*[ΔT]=[ΔV] (1)

In formula (1), V is the voltage gradient, T is the temperature gradient, and S[T] is the Seebeck coefficient, where the Seebeck coefficient varies from material to material, that is, different materials have different Seebeck coefficients.

S3: Adjust the energization of the electromagnetic coil in the fan according to the current temperature variation, so as to realize the adjustment of the fan speed.

In a specific implementation, according to the current temperature change, the corresponding relationship between the pre-established temperature change and the output load and the corresponding relationship between the output load and the fan speed can be queried for the target speed corresponding to the current temperature change, and then the fan can be adjusted The energization amount of the electromagnetic coil inside is used to control the fan speed so that the fan speed reaches the target speed, thereby realizing the adjustment of the fan speed.

A method for controlling the speed of a PSU fan provided in this embodiment is applied to a control system for the speed of a PSU fan including a voltmeter, a voltage amplifier, an AD converter and a CPU. The method includes receiving the voltage difference sent by the AD converter. Digital quantity; wherein, the digital quantity of the voltage difference is obtained by amplifying the voltage difference at both ends of the PCB golden finger measured by the voltmeter through the voltage amplifier, and converting the analog quantity of the amplified voltage difference through the AD converter; The current temperature change is calculated according to the digital value of the voltage difference; the current flow of the electromagnetic coil in the fan is adjusted according to the current temperature change, so as to realize the adjustment of the fan speed. It can be seen that compared with the traditional method, this method does not need to use a temperature sensor, that is, it does not need to install a temperature sensor on each heat source element in the PSU to measure the temperature change of each device, but obtains it through the voltage difference between the two ends of the gold finger. The current temperature change inside the PSU, and then adjust the fan speed according to the current temperature change, so the number of heat sinks used is effectively reduced, the use space inside the PSU is increased, and the economy is improved at the same time.

On the basis of the above-mentioned embodiments, in order to ensure that the air flow of the fan can dissipate heat from each heat source element in the PSU, it is necessary to determine the target speed corresponding to the current temperature change, and adjust the fan speed to the target speed so that the generated air flow can be Take the heat energy of each heat source element in the PSU out of the PSU. This step includes:

Obtaining the target rotational speed corresponding to the current temperature variation according to the correspondence between the pre-established temperature variation and the output load of the PSU and the correspondence between the output load of the PSU and the fan speed;

Adjust the energization of the electromagnetic coil in the fan so that the current speed of the fan is consistent with the target speed.

In the specific implementation, it is necessary to predetermine the corresponding relationship between the output load of the PSU and the amount of temperature change. Since there is a corresponding relationship between the amount of temperature change and the air flow required for heat dissipation, the corresponding relationship between the output load of the PSU and the air flow can be established. , further, since there is a corresponding relationship between the air flow and the fan speed, the corresponding relationship between the output load of the PSU and the fan speed can be established, so that when the current temperature change is calculated, the temperature change can be calculated according to the relationship between the temperature change and the output load of the PSU The corresponding relationship and the corresponding relationship between the output load of the PSU and the fan speed query the target speed corresponding to the current temperature change, and then adjust the current flow of the electromagnetic coil in the fan to make the current speed of the fan consistent with the target speed to dissipate heat from the PSU .

In this embodiment, the target speed corresponding to the current temperature change is obtained based on the corresponding relationship between the temperature change and the output load of the PSU and the corresponding relationship between the output load of the PSU and the fan speed. The current rotation speed is consistent with the target rotation speed, so as to ensure that the generated air flow can fully dissipate heat to each heat source element in the PSU.

On the basis of the above-mentioned embodiments, since the temperature variation is generally small, in order to facilitate the determination of the target rotational speed of the fan, this embodiment processes the calculated temperature variation and amplifies the temperature variation to construct its A clearer correspondence with the PSU output load. This step includes:

A target temperature threshold value corresponding to the current temperature change amount is obtained according to the current temperature change amount; wherein, the temperature threshold value is proportional to the temperature change amount;

Correspondingly, adjusting the energization of the electromagnetic coil in the fan according to the current temperature variation includes:

The energization amount of the electromagnetic coil in the fan is adjusted according to the target temperature threshold.

It can be understood that, in order to clarify the corresponding relationship between the temperature variation and the PSU output load, the temperature threshold should be much larger than the temperature variation, for example, the temperature threshold may be 20 or 50 times the temperature variation. In addition, in the specific implementation, the corresponding relationship between the PSU output load and the temperature threshold and the corresponding relationship between the PSU output load and the fan speed should be established in advance, so that the ventilation of the electromagnetic coil in the fan can be adjusted according to different temperature thresholds. Power to control the speed of the fan.

In this embodiment, the calculated temperature variation is amplified. By amplifying the temperature variation into a temperature threshold, the corresponding relationship between it and the PSU output load is clearer, so that the output load of the PSU can be easily calculated. The corresponding relationship between the temperature threshold value and the corresponding relationship between the PSU output load and the fan speed determines the target speed of the fan.

On the basis of the above embodiments, since the adjusted fan speed may have a tolerance, this embodiment constructs the corresponding relationship between the output load of the PSU and the maximum and minimum speed of the fan, and according to the current speed of the fan and its maximum speed Whether there is tolerance is judged by the subordination relationship between the rotational speed interval composed of the minimum rotational speed and the minimum rotational speed. This step includes:

Obtain the fan speed range corresponding to the current output load of the PSU according to the pre-established correspondence between the output load of the PSU and the fan speed;

Determine whether the current speed of the fan is within the speed range;

If so, enter the step of receiving the digital quantity of the voltage difference sent by the AD converter;

If not, adjust the conduction amount of the electromagnetic coil in the fan so that the current speed of the fan is within the speed range.

Table 1 is a correspondence table between the output load of a PSU and the maximum and minimum speeds of the fans provided in this application. As shown in Table 1, the maximum and minimum speeds of the fans constitute the speed range, and each output of the PSU Each load has a speed range corresponding to it one by one. In a specific implementation, if the current speed of the fan is not within the range of the speed range corresponding to the current output load of the PSU, it can be considered that there is tolerance, and the current speed of the fan needs to be corrected to reduce the tolerance, that is, continue to adjust the electromagnetic in the fan. The energizing amount of the coil is such that the current speed of the fan is within the speed range corresponding to the current output load of the PSU; and if the current speed of the fan is within the range of the speed range corresponding to the current output load of the PSU, it can be considered that there is currently no tolerance.

Table 1 Corresponding relationship between the output load of the PSU and the maximum and minimum speeds of the fans

PSU output load Maximum speed (rev/min) Minimum speed(rev/min) 0.00% 0 0 10.00% 3300 2400 20.00% 6500 5600 30.00% 10500 9450 40.00% 14500 13050 50.00% 17500 15750 60.00% 21000 18900 70.00% 24500 22050 80.00% 28000 25200 90.00% 31500 28350 100.00% 35000 31500

This embodiment constructs the corresponding relationship between the output load of the PSU and the maximum and minimum rotational speeds of the fan. When the current rotational speed of the fan is not within the rotational speed range, adjust the energized amount of the electromagnetic coil to correct the current rotational speed of the fan to the current rotational speed of the fan. In this speed range, the tolerance is reduced.

On the basis of the above embodiments, since the PSU is in the overheated state for a long time, it will affect its normal operation, so it is necessary to accurately identify whether the PSU is in the overheated state. In this embodiment, it is identified whether the PSU is in an overheated state according to the current temperature variation. This step includes:

Determine whether the current temperature change reaches the temperature change threshold;

If so, determine that the PSU is in an overheated state;

If not, enter into the step of adjusting the energizing amount of the electromagnetic coil in the fan according to the current temperature variation.

The temperature change threshold is a preset overheat threshold of the PSU. When the temperature change reaches the temperature change threshold, it can be considered that the PSU is in an overheated state; otherwise, the PSU is not considered to be in an overheated state. It should be noted that, in a specific implementation, the temperature change threshold should not be too large, otherwise the overheating state of the PSU cannot be accurately identified and the PSU will work under the overheating state for a long time.

In this embodiment, when the temperature variation reaches a preset temperature variation threshold, it is determined that the PSU is in an overheated state, and it is possible to accurately identify whether the PSU is in an overheated state.

On the basis of the above embodiments, after determining that the PSU is in an overheated state, this embodiment further includes: controlling an alarm device to issue an alarm.

In a specific implementation, the alarm device can be a buzzer, which can be used to alarm by controlling the buzzer to always ring, or an indicator light, which can be used to alarm by controlling the indicator light to always be on, or a microphone, which can be used to alarm by sending a voice prompt. This embodiment does not limit the type and alarm mode of the alarm device.

In this embodiment, after determining that the PSU is in an overheated state, the alarm device is controlled to give an alarm to remind the user that the PSU is in an overheated state at this time, so that the user can take measures to dissipate heat from the PSU.

In the above embodiments, the method for controlling the rotational speed of the PSU fan is described in detail, and the present application also provides corresponding embodiments of the apparatus for controlling the rotational speed of the PSU fan. It should be noted that this application describes the embodiments of the device part from two perspectives, one is based on the perspective of functional modules, and the other is based on the perspective of hardware.

Fig. 5 is a structural diagram of a control device for a PSU fan speed provided by the present application. As shown in Fig. 5, the device includes:

The receiving module 10 is used to receive the digital quantity of the voltage difference sent by the AD converter; wherein, the digital quantity of the voltage difference is to amplify the voltage difference at both ends of the PCB golden finger measured by the voltmeter through the voltage amplifier, and pass the AD The converter converts the analog value of the amplified voltage difference to obtain;

Calculation module 11, is used for calculating current temperature variation according to the digital quantity of voltage difference;

The adjustment module 12 is configured to adjust the energization of the electromagnetic coil in the fan according to the current temperature variation, so as to adjust the rotation speed of the fan.

Since the embodiment of the device part corresponds to the embodiment of the method part, please refer to the description of the embodiment of the method part for the embodiment of the device part, and details will not be repeated here.

The control device of the PSU fan speed provided by this embodiment receives the digital quantity of the voltage difference sent by the AD converter through the receiving module; wherein, the digital quantity of the voltage difference is the PCB golden finger measured by the voltage amplifier to the voltmeter The voltage difference at both ends is amplified, and the analog value of the amplified voltage difference is converted by an AD converter; through the calculation module, the current temperature change is calculated according to the digital value of the voltage difference; through the adjustment module, according to the current The amount of temperature change adjusts the energization of the electromagnetic coil in the fan, so as to realize the adjustment of the rotation speed of the fan. It can be seen that the device calculates the current temperature change inside the PSU through the voltage difference between the two ends of the gold finger, and then adjusts the fan speed according to the current temperature change. There is no need to install temperature sensors on each heat source element inside the PSU to measure the temperature of each device. The amount of change, therefore, effectively reduces the number of heat sinks used, increases the space used inside the PSU, and improves economy at the same time.

FIG. 6 is a structural diagram of another PSU fan speed control device provided by the present application. As shown in FIG. 6, the device includes:

memory 20 for storing computer programs;

The processor 21 is configured to implement the steps of the method for controlling the rotation speed of the PSU fan mentioned in the above-mentioned embodiments when executing the computer program.

The device for controlling the fan speed of the PSU provided in this embodiment may include, but is not limited to, a smart phone, a tablet computer, a notebook computer or a desktop computer, and the like.

Wherein, the processor 21 may include one or more processing cores, such as a quad-core processor, an octa-core processor, and the like. Processor 21 can adopt at least one hardware form in Digital Signal Processor (Digital Signal Processor, DSP), Field-Programmable Gate Array (Field-Programmable Gate Array, FPGA), Programmable Logic Array (Programmable LogicArray, PLA) accomplish. Processor 21 may also include a main processor and a coprocessor, the main processor is a processor for processing data in the wake-up state, also called CPU; the coprocessor is used for processing data in the standby state A low-power processor for processing. In some embodiments, the processor 21 may be integrated with a graphics processor (Graphics Processing Unit, GPU), and the GPU is used for rendering and drawing the content that needs to be displayed on the display screen. In some embodiments, the processor 21 may also include an artificial intelligence (AI) processor, and the AI processor is used to process calculation operations related to machine learning.

Memory 20 may include one or more computer-readable storage media, which may be non-transitory. The memory 20 may also include high-speed random access memory, and non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In this embodiment, the memory 20 is at least used to store the following computer program 201, wherein, after the computer program is loaded and executed by the processor 21, it can realize the relevant steps of the method for controlling the PSU fan speed disclosed in any of the above-mentioned embodiments. In addition, the resources stored in the memory 20 may also include an operating system 202 and data 203, etc., and the storage method may be temporary storage or permanent storage. Wherein, the operating system 202 may include Windows, Unix, Linux and so on. The data 203 may include but not limited to the digital value of the voltage difference sent by the AD converter and the like.

In some embodiments, the device for controlling the fan speed of the PSU may further include a display screen 22 , an input/output interface 23 , a communication interface 24 , a power supply 25 and a communication bus 26 .

Those skilled in the art can understand that the structure shown in FIG. 6 does not constitute a limitation on the device for controlling the PSU fan speed, and may include more or less components than shown in the figure.

The device for controlling the rotational speed of the PSU fan provided in this embodiment includes a memory and a processor. When the processor executes the program stored in the memory, it can realize the above method for controlling the rotational speed of the PSU fan, and the effect is the same as above.

Finally, the present application also provides an embodiment corresponding to a computer-readable storage medium. A computer program is stored on the computer-readable storage medium, and when the computer program is executed by the processor, the steps of the method for controlling the fan speed of the PSU as described in the above method embodiments are implemented.

It can be understood that if the methods in the above embodiments are implemented in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or part of the contribution to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , executing all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other various media that can store program codes. .

The computer-readable storage medium provided by this embodiment includes the method for controlling the rotation speed of the PSU fan mentioned above, and the effect is the same as above.

The method, system, device and medium for controlling the PSU fan speed provided by the present application have been introduced in detail above. Each embodiment in the description is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other. As for the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and for relevant details, please refer to the description of the method part. It should be pointed out that those skilled in the art can make some improvements and modifications to the application without departing from the principles of the application, and these improvements and modifications also fall within the protection scope of the claims of the application.

It should also be noted that in this specification, relative terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that these entities or operations There is no such actual relationship or order between the operations. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

Claims (10)

1. A PSU fan speed control system comprising: the voltage meter, the voltage amplifier, the AD converter and the CPU;

the voltmeter is connected with the PCB golden finger and is used for measuring the voltage difference value at two ends of the PCB golden finger;

the voltage amplifier is connected with the voltmeter and used for amplifying the voltage difference value;

the AD converter is connected with the voltage amplifier and is used for converting the amplified analog quantity of the voltage difference value into a digital quantity;

the CPU is connected with the AD converter and the fan, and is used for receiving the digital quantity of the voltage difference value sent by the AD converter, calculating the current temperature change quantity according to the digital quantity of the voltage difference value, and adjusting the energizing quantity of an electromagnetic coil in the fan according to the current temperature change quantity.

2. A method of controlling a PSU fan speed, characterized by being applied to a PSU fan speed control system including a voltmeter, a voltage amplifier, an AD converter, and a CPU, the method comprising:

receiving a digital quantity of the voltage difference value sent by the AD converter; the digital quantity of the voltage difference is obtained by amplifying the voltage difference between two ends of the PCB golden finger measured by the voltmeter through a voltage amplifier and converting the amplified analog quantity of the voltage difference through the AD converter;

calculating a current temperature variation according to the digital quantity of the voltage difference value;

and adjusting the current power-on quantity of an electromagnetic coil in the fan according to the current temperature variation quantity so as to realize the adjustment of the rotating speed of the fan.

3. The method of controlling the rotational speed of a PSU fan according to claim 2, wherein said adjusting the energization amount of the electromagnetic coil in the fan according to the current temperature variation amount includes:

obtaining a target rotating speed corresponding to the current temperature variation according to a pre-established corresponding relation between the temperature variation and the output load of the PSU and a corresponding relation between the output load of the PSU and the rotating speed of a fan;

and adjusting the energizing amount of the electromagnetic coil in the fan so as to enable the current rotating speed of the fan to be consistent with the target rotating speed.

4. The method of controlling a PSU fan speed according to claim 2, further comprising, after the calculating a current temperature change amount from the digital amount of the voltage difference value:

obtaining a target temperature threshold corresponding to the current temperature variation according to the current temperature variation; wherein the temperature threshold is proportional to the temperature variation;

correspondingly, the adjusting the energizing amount of the electromagnetic coil in the fan according to the current temperature variation amount comprises:

and adjusting the energizing quantity of the electromagnetic coil in the fan according to the target temperature threshold value.

5. The method of controlling a PSU fan speed according to claim 4, further comprising, after said adjusting an energization amount of said electromagnetic coil in said fan according to said target temperature threshold:

obtaining a rotating speed interval of the fan corresponding to the current output load of the PSU according to a pre-established corresponding relation between the output load of the PSU and the rotating speed of the fan;

judging whether the current rotating speed of the fan is in the rotating speed interval or not;

if yes, entering a step of receiving the digital quantity of the voltage difference value sent by the AD converter;

if not, the power-on quantity of the electromagnetic coil in the fan is regulated so that the current rotating speed of the fan is in the rotating speed interval.

6. The method of controlling a PSU fan speed according to claim 2, characterized by further comprising, after said calculating a current temperature change amount from said digital amount of said voltage difference, and before said adjusting an energization amount of a solenoid coil in a fan according to said current temperature change amount:

judging whether the current temperature variation reaches a temperature variation threshold value or not;

if yes, determining that the PSU is in an overheat state;

if not, the step of adjusting the power-on quantity of the electromagnetic coil in the fan according to the current temperature variation quantity is carried out.

7. The method of controlling a PSU fan speed of claim 6, further comprising, after said determining that said PSU is in an overheated state: and controlling the alarm device to alarm.

8. A PSU fan speed control apparatus, comprising:

the receiving module is used for receiving the digital quantity of the voltage difference value sent by the AD converter; the digital quantity of the voltage difference is obtained by amplifying the voltage difference between two ends of the PCB golden finger measured by the voltmeter through a voltage amplifier and converting the amplified analog quantity of the voltage difference through the AD converter;

a calculation module for calculating a current temperature variation according to the digital number of the voltage difference;

and the adjusting module is used for adjusting the electrifying quantity of the electromagnetic coil in the fan according to the current temperature variation quantity so as to realize the adjustment of the rotating speed of the fan.

9. A PSU fan speed control apparatus, comprising:

a memory for storing a computer program;

a processor for implementing the steps of the PSU fan speed control method according to any one of claims 2 to 7 when executing said computer program.

10. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the PSU fan speed control method according to any one of claims 2 to 7.